Abstract
In continuation of our investigations on Langmuir films of functional heterocyclic copolymers, we report the Langmuir film characteristics of new conjugated (ABAC)n and (ABAA)n copolymers, as inferred through surface pressureâarea isotherms and Brewster angle microscopy. These processible copolymers consist of a N-dodecyl-2,5-bis(2-thienyl)pyrrole trimer in alternation with a phenylene, dioctyloxyphenylene, or thienylene unit. Their synthesis was performed using the Stille coupling reaction and the copolymers were fully characterized before studying the Langmuir film-forming characteristics. In comparison to homopolymers such as poly(3-alkylthiophene)s and poly(N-alkylpyrrole)s, these copolymers were found to form reasonably stable Langmuir films with high collapse pressures at the airâwater interface.
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